Harrow



J. DINVJIDDIE May 16, 1939.

HARROW Filed April 28, 1938 3 Sheets-Sheet l v Inventor Jase 0A nw/a a k J. DINWIDDIE HARROW 3 Sheets-Sheet 2 Filed April 28, 1938 v ose l amw/ May 16, 1939.

J. DINWIDDIE HARROW Filed April 28, 1938 s Sheets-v-Shet 's jLm' Inventor Ase 4 /n /a J/ Patented May 16, 1939 UNITED STATES PATENT OFFICE mmaow Joseph Dinwiddie, Cancyville, 1. Application April 28,1938, Serial No. 204,874

' Stillanotherimportant object of the invention is to provide a harrow of the character stated constructed in such a manner as to prevent doubling over" in paralleling harrowed ground. Other important objects'and advantages of the invention will become apparent to the reader of the following specification In the drawings:- Figure 1 represents a harrow. A

Figure 2 is a top plan .view with the .beam in the act of being swung to reverse the parts for perspective view of the reverse travel of the machine.

Figure 3 is a top plan view of the machine with the'draft beam reversed.

Referring to the drawings, wherein like numerals designate like parts, it can be seen that the machine consists of the annular frame 5 diametrically under the same passing the bar 6 which is provided with the upstanding lug I secured thereto. The bar 6 is provided with the depending intermediate portion 8 vertically bored to receive the headed pin 9 which passes downwardly through the draft beam in and through the rocker II. The forward end of the draft beam I is provided with the mounting l3 for the vertical disk i4 while mounted upon the rearend of the beam I0 is the seat l secured to the beam by the spring l6.

The land-side of the machine has the T-head formation ll swing'ably'connectedto the bar 6 as at 6a each end of which is thickened and vettically bored to receive a'shaft l8, the shafts being provided with laterally disposed arms l9 at their upper ends. The free ends of these arms are apertured to receive the pintle ends of the rods'20-20, these rods -20 having'their inner ends bent downwardly into openings of the ends of the rocker ll.

The lower ends of the shafts l3 are bent inwardly to form stub shafts 2| for the stay wheels 22.

A brace bar 23 extends between each end of the 'T-head frame l1 "and the annular frame 5 consisting of turnbuckle connected sections, the outer end of each outer section being pivotally connected to the T-head formation I! as at 23a.

The other end of the bar 6 is provided with the connection formation 24, the lower end of which is secured to the shaft which extends transversely under the machine and carries the ground engaging disks 25.

A vertically disposed shaft 26 extends upwardly through the portion 24' and across the opening therein, the lower end of this shaft 26 being provided with the inclined stub axle 21 on which the toad stay wheel 28 is mounted.

An arcuate shaped cross bar 23 is provided on theupper portion of the shaft 26 and a pair of I Iu's 5 and the pin S-extends downwardly through the brace 5a and into the upper portion of the box a through which the shaft carrying the disks 25 passes. Brace members'25b extend upwardly from cars on the box 25a to thebrace 5:1.

It will be observed, that the machine will afford a smooth tillage from the 'foot of a hill to the top thereof and that there will be no lost energy as in double disking" when a considerable amount of the draft energy is lost. I 1

The stay wheels are preferably mounted in roller bearings. Furthermore, when the machine has travelled'to one end of the field, the

stay wheels will hold the frame against turning as the team is sw'ung around and the beam I0 is rotated on the frame 5. In this connection, it can be seen that the guide 32 prevents the beam from lifting from the/frame 5, while the reduced portion 33 of the beam is so constructed as to avoid the connecting rod.

It will be observed, that the stay wheels will run in the disk furrow and will prevent the machine from rocking when the beam or tractor has the pull directly on the center'of the machine. Obviously, when the beam; I0 is rotated on the frame 5 the position of the beam will the wheel 28 will be acted upon by reason of the connecting rod connections ll between the arm H and the arcuate cross-member 29. This will set the stay wheels in the proper angular relation for operation of the harrow in reverse direction, thus eliminating the turning oi the A narrow comprising a frame, a cross bar secured to the irame, a draft beam rotatably mounted on the irame, stay wheels at the end of the bar, means operated by rotation of the beam on the frame changing the position of the said stay wheels, said means consisting of .a rocker, mounts for the stay wheels. and connections between the rocker and the stay wheels for resetting the stay wheels when the draft beam is rotated on the frame topermit the ma- 1 chine to be pulled in an opposite direction.

JOSEPH DINWIDDIE. 

